noun, plural sul·ci [suhl-sahy] /ˈsʌl saɪ/.
Origin of sulcus
Related formssub·sul·cus, noun, plural sub·sul·ci.
Examples from the Web for sulcus
A muscular ridge, called the crista terminalis, corresponding to the sulcus terminalis on the exterior.
Sulcus longitudinalis in superiore latere perforatus serie punctorum.
There is only one ciliated groove, the sulcus, in the stomodaeum.
These grooves are known as the sulcus and sulculus, and will be more particularly described hereafter.
Each zooid has six tentacles; the stomodaeum is elongate, but the sulcus and sulculus are very feebly represented.